CN106496155B - A kind of aminothiazole quinoline chiral ligand and its preparation method and application - Google Patents

A kind of aminothiazole quinoline chiral ligand and its preparation method and application Download PDF

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CN106496155B
CN106496155B CN201610932167.0A CN201610932167A CN106496155B CN 106496155 B CN106496155 B CN 106496155B CN 201610932167 A CN201610932167 A CN 201610932167A CN 106496155 B CN106496155 B CN 106496155B
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ligand compound
aminothiazole
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CN106496155A (en
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傅滨
麻红利
白慧
谢磊
张振华
覃兆海
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China Agricultural University
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    • C07D277/00Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
    • C07D277/02Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
    • C07D277/08Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D277/10Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
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    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/18Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
    • B01J31/1805Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms the ligands containing nitrogen
    • B01J31/181Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine
    • B01J31/1815Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine with more than one complexing nitrogen atom, e.g. bipyridyl, 2-aminopyridine
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Abstract

The invention discloses the aminothiazole quinoline chiral ligand compounds and its preparation method and application that a kind of phenyl ring is skeleton.Using o-nitrobenzoic acid as raw material, chiral amino alcohol is chiral source, and the aminothiazole quinoline chiral ligand of the skeleton structure containing phenyl ring is easily synthesized very much through three steps " one kettle way ".Pd (II) complex compound made of the chiral ligand compound is in catalysis malonate and (E) -1, excellent enantioselectivity is shown in the asymmetric allyl group alkylated reaction of 3- diphenyl -2- allyl acetic acid ester, provides a kind of novel chiral ligands compound or catalyst for organic synthesis field.The structural formula general formula of aminothiazole quinoline ligand compound of the present invention is as follows:

Description

A kind of aminothiazole quinoline chiral ligand and its preparation method and application
Technical field
The invention belongs to technical field of organic synthesis, it is related to a kind of aminothiazole quinoline chiral ligand compound and its preparation side Method and application, and in particular to a kind of aminothiazole quinoline chiral ligand compound of the skeleton structure containing phenyl ring and preparation method thereof and Application in asymmetric allyl group alkylated reaction.
Background technique
In the past few decades, asymmetric catalysis field achieves fast development, is the most significantly to develop a variety of tools There is the chiral ligand of excellent catalysis characteristics.The exploitation of chiral ligand is the eternal theme of asymmetric catalysis field.Currently, chiral thiophene Oxazoline ligand is a kind of chiral ligand being not yet fairly well-developed, and can be divided into single thiazoline, double according to the number of thiazoline ring The three classes such as thiazoline and three thiazoline ligands.The document report synthesized and its applied in asymmetric syntheses in relation to thiazoline ligand Road is less.Majority research is in conjunction with carrying out compared with the oxazole Phosphine ligands catalytic performance.It is worth noting that, 2014 shut out Great Ming seminar [Peng, J.-H.;Du, D.-M.RSC Adv.2014,4,2061] discovery is studied in beta-ketoester and β-amide Asymmetric fluorination reaction in, chiral Bisthiazoline ligand-Cu (OTf)2Complex compound is than corresponding oxazoline ligand-Cu (OTf)2 Complex compound provides higher enantioselectivity.Also illustrate that chiral thiazoline ligand is that a kind of chirality with very great development potentiality is matched Body is not to be regarded as the analog of only oxazoline ligand.This seminar [Liu, L.et al.Tetrahedron Asymmetry, 2012,22,550] the fragrant methene Bisthiazoline ligand of exploitation is in catalyzing indole and benzene methylene malonic acid ester Excellent catalytic effect (99%yield, 99%ee) is shown in Friedel-Crafts alkylated reaction.Therefore it develops completely newly There is ligand based on chiral thiazoline ring important theory and actual application to be worth.
Summary of the invention
The object of the present invention is to provide a kind of new aminothiazole quinoline chiral ligand compounds.With cheap ortho-nitrophenyl first Acid is raw material, and chiral amino alcohol is chiral source, a kind of very succinct aminothiazole for synthesizing completely new skeleton structure containing phenyl ring Quinoline chiral ligand compound.The general structure of aminothiazole quinoline ligand compound provided by the invention is as follows:
In Formulas I:
R1Selected from hydrogen, alkyl, aryl, halogen, nitro, cyano;
R2And R3It is respectively selected from hydrogen, alkyl, aryl, halogen ,-CO2R4Or-C (R5)2OR6, the R4Selected from alkyl or cycloalkanes Base, aryl;R5Selected from hydrogen, alkyl or cycloalkyl, aryl;R6Selected from hydrogen, alkyl, aryl, trimethyl silicon substrate, fert-butyidimethylsilyl Silicon substrate.
4 or 5 are asymmetric carbon atom on thiazoline ring.
Further, the aminothiazole quinoline chiral ligand compound is one of following I-a~I-e:
I-a:R1=H,R2=Ph,R3=H, chiral carbonoid: S
I-b:R1=H,R2=Bn,R3=H, chiral carbonoid: S
I-c:R1=H,R2=-CH(CH3)2,R3=H, chiral carbonoid: S
I-d:R1=H,R2=-CHCH2(CH3)2,R3=H, chiral carbonoid: S
I-e:R1=H,R2=-CH3,R3=H, chiral carbonoid: S
It is a further object to provide a kind of preparation methods of aminothiazole quinoline chiral ligand compound, with adjacent nitre Yl benzoic acid is raw material, successively after three steps, " one kettle way " synthesis.Reaction equation and steps are as follows:
(1) acylated: by o-nitrobenzoic acid or ortho-aminobenzoic acid and acylating reagent thionyl chloride, oxalyl chloride, phosphoric Phosphorus or phosphorus oxychloride 1:(1.2~20 in molar ratio) react 0.5 at 0~100 DEG C~for 24 hours to get arriving corresponding acid chloride intermediate;
(2) amidation: the acid chloride intermediate and corresponding chiral amino alcohol that step (1) is obtained in molar ratio 1:(1.2~ 5) it is added in inert organic solvents tetrahydrofuran, methylene chloride or chloroform, in excessive organic base: pyridine, triethylamine, DBU; Or inorganic base: NaOH, NaHCO3In the presence of, 0.5 is stirred to react in room temperature~-78 DEG C~for 24 hours, i.e. generation hydroxy amide II;
(3) cyclisation/reduction: 1:(2~20 in molar ratio the hydroxy amide II and phosphorus pentasulfide that step (2) is obtained) plus Entering into atent solvent toluene or benzene, in the presence of organic base pyridine or triethylamine, 80~120 DEG C are stirred to react 2~48h, Generate corresponding aminothiazole quinoline compound.
Further, o-nitrobenzoic acid (or ortho-aminobenzoic acid) is commercially available in above-mentioned steps (1).
Further, chiral amino alcohol is two kinds of configurations of L and D in above-mentioned steps (2), by natural or non-natural amino acid system ?.
Further, the dosage of inert organic solvents tetrahydrofuran, methylene chloride or chloroform is chiral ammonia in above-mentioned steps (2) 20~200 times of base alcohol mole.
Further, in the reaction of the step (3) while intramolecular dehydration cyclization, nitro is reduced into amino.
Further, in above-mentioned steps (3), the dosage of atent solvent benzene or toluene be hydroxy amide II mole 40~ 100 times.The dosage of organic base pyridine or triethylamine is 4~30 times of hydroxy amide II mole.
A further object of the present invention is to provide Pd made of a kind of aminothiazole quinoline chiral ligand compound and metal salt (II) or Pd (0) complex compound, for being catalyzed the application of following asymmetric allyl group alkylated reaction,
Advantages of the present invention:
Aminothiazole quinoline ligand compound preparation method simple process of the present invention, raw material is cheap and easy to get, avoids adjacent amino Benzoic acid (belonging to country's control chemicals, be difficult to buy) is as starting material.Reaction condition is mild, easily operated.Gained Aminothiazole quinoline ligand compound structure novel can form complex compound chiral catalyst with transition metal, show good Asymmetry catalysis performance, in the asymmetric allyl alkane of catalysis malonate and (E) -1,3- diphenyl -2- allyl acetic acid ester Excellent enantioselectivity is shown in glycosylation reaction, for organic synthesis field provide a kind of novel chiral ligands compound or Catalyst provides strong experiment basis to develop new method of asymmetric synthesis, for development new medicine and novel pesticide and New material provides strong synthetics.
Specific embodiment
The invention will be further described with reference to embodiments.Embodiment below is further explanation of the invention, Rather than it limit the invention in any way.Those skilled in the art nonessential changes according to some of the above content of invention It is all belonged to the scope of protection of the present invention into adjustment.
The synthesis of 1 ligand 2- of embodiment [(S) -4,5- dihydro -4- phenyl -2- thiazolinyl] aniline I-a
O-nitrobenzoic acid 0.5g (3.0mmol) is added in 50mL round-bottomed flask, thionyl chloride 0.5mL is heated to reflux 4h is cooled to room temperature, and vacuum rotary steam removes excessive thionyl chloride, obtains corresponding acid chloride intermediate, and with the dichloromethane of drying Alkane 10mL dissolution.L- benzene glycinol 0.49g (3.6mmol) is added in another reaction flask, methylene chloride 30mL and triethylamine 5mL, system are cooled to 0 DEG C.The dichloromethane solution of acyl chlorides obtained by upper step is added thereto.It finishes, 4h is stirred at room temperature.Decompression rotation Solvent is evaporated off, obtains corresponding hydroxy amide intermediate, is no longer further purified to be directly used in and react in next step.
30mL toluene and 5mL triethylamine is added, is heated to reflux state, phosphorus pentasulfide 2.66g is added altogether in three batches (12mmol), charging finishes, and continues the 4h that flows back, end of reaction.It is cooled to room temperature, pours out reaction solution, ethyl acetate washing reaction Bottle, and merge with liquid is poured out, vacuum rotary steam obtains crude product after sloughing solvent, directly passes through silica gel column chromatography separating-purifying (acetic acid Ethyl ester/petroleum ether=1:3, v/v), obtain target product I-a: yellow solid, 62% yield;M.p.52~54 DEG C, 1H NMR(300MHz,CDCl3)δ7.60(dd,J=8.1,1.4Hz,1H), 7.54–7.31(m,5H),7.30–7.22(m,1H),6.80–6.68(m,2H),6.32(s,2H),5.82(t,J=9.0Hz, 1H),3.73(dd,J=10.9,8.5Hz,1H),3.21(dd,J=10.8,9.5Hz,1H).13C NMR(75MHz,CDCl3)δ 169.35,147.55,142.13,132.15,131.46,128.35,127.29,126.21,115.88,115.71,114.39, 80.57,39.01.
High resolution mass spectrum data: ESI-HRMS Calcd for C15H15N2S[M+H]+:255.0950,Found: 255.0954.
The synthesis of 2 ligand 2- of embodiment [(S) -4,5- dihydro -4- benzyl -2- thiazolinyl] aniline I-b
The L- benzene glycinol in example 1 is replaced with L- phenylalaninol, remaining obtains aminothiazole quinoline ligand with embodiment 1 I-b, yellow solid, yield 53%, m.p.70~72 DEG C, Its nucleus n-ness spectrum number According to as follows:
1H NMR(300MHz,CDCl3)δ7.54(dd,J=8.1,1.3Hz,1H),7.45–7.17(m,6H),6.86–6.63 (m,2H),6.25(s,2H),5.09–4.91(m,1H),3.29(ddd,J=18.3,12.2,7.3Hz,2H),3.08(dd,J= 10.9,7.4Hz,1H),2.97(dd,J=13.5,7.9Hz,1H).13C NMR(75MHz,CDCl3)δ167.78,147.39, 138.68,132.03,131.25,128.97,128.18,126.12,115.86,115.64,114.50,78.79,40.80, 35.50.
High resolution mass spectrum data: ESI-HRMS Calcd for C16H17N2S[M+H]+:269.1107,Found: 269.1107.
The synthesis of 3 ligand 2- of embodiment [(S) -4,5- dihydro -4- isopropyl -2- thiazolinyl] aniline I-c
The L- benzene glycinol in example 1 is replaced with L- valerian ammonia alcohol, remaining obtains aminothiazole quinoline ligand i-with embodiment 1 C, yellow oil, yield 49%,Its nucleus n-ness spectrum data is as follows:
1H NMR(300MHz,CDCl3)δ7.45(dd,J=7.8,1.4Hz,1H),7.17(ddd,J=8.5,7.2,1.5Hz, 1H),6.75–6.60(m,2H),6.25(s,2H),4.44(ddd,J=9.7,8.4,6.8Hz,1H),3.29(dd,J=10.8, 8.4Hz,1H),2.99(dd,J=10.7,9.8Hz,1H),2.12–1.92(m,1H),1.12(d,J=6.7Hz,3H),1.04(d, J=6.7Hz,3H).13C NMR(75MHz,CDCl3)δ166.96,147.29,131.91,131.02,115.83,115.57, 114.69,84.22,33.72,33.14,19.63,19.19.
High resolution mass spectrum data: ESI-HRMS Calcd for C12H17N2S[M+H]+:221.1107,Found: 221.1111.
The synthesis of 4 ligand 2- of embodiment [(S) -4,5- dihydro -4- isobutyl group -2- thiazolinyl] aniline I-d
The L- benzene glycinol in example 1 is replaced with L- leucinol, remaining obtains aminothiazole quinoline ligand i-with embodiment 1 D, yellow oil, yield 50%,Its nucleus n-ness spectrum data is as follows: 1H NMR (300MHz,DMSO)δ7.59–7.49(m,1H),7.23(ddd,J=8.6,7.3,1.5Hz,1H),6.73(dtd,J=8.2, 3.5,1.1Hz,2H),6.31(br s,2H),4.89–4.70(m,1H),3.40(dd,J=10.7,8.0Hz,1H),2.94(dd, J=10.7,8.4Hz,1H),2.02–1.79(m,2H),1.55(dt,J=13.5,6.9Hz,1H),1.10(d,J=6.5Hz,3H), 1.07(d,J=6.5Hz,3H).13C NMR(75MHz,CDCl3)δ167.17,147.61,132.29,131.37,116.15, 115.92,114.97,76.20,44.70,36.87,26.24,22.96,22.61.
High resolution mass spectrum data: ESI-HRMS Calcd for C13H19N2S[M+H]+:235.1263,Found: 234.1265
The synthesis of 5 ligand 2- of embodiment [(S) -4,5- dihydro -4- methyl -2- thiazolinyl] aniline I-e:
The L- benzene glycinol in example 1 is replaced with L- aminopropanol, remaining obtains aminothiazole quinoline ligand with embodiment 1 I-e, yellow oil, yield 55%,Its nucleus n-ness spectrum data is as follows:
1H NMR(300MHz,CDCl3)δ7.48(ddd,J=7.8,1.5,0.4Hz,1H),7.24–7.13(m,1H), 6.75–6.63(m,2H),6.24(br s,2H),4.90–4.74(m,1H),3.41(dd,J=10.7,8.0Hz,1H),2.92 (dd,J=10.7,7.7Hz,1H),1.47(d,J=6.7Hz,3H).13C NMR(75MHz,CDCl3)δ166.97,147.38, 131.99,131.15,115.86,115.66,114.55,72.85,37.82,20.62.
High resolution mass spectrum data: ESI-HRMS Calcd for C10H13N2S[M+H]+:193.0794,Found: 193.0796.
Embodiment 6: asymmetric allyl group alkylated
[Pd(η3-C3H5)Cl]2(0.0125mmol), anhydrous K OAc (0.1mmol) and chiral amino thiazoline ligand i-e (0.03mmol) stirs 0.5h in methylene chloride (2.0mL) under nitrogen protection.At room temperature, (E) -1,3- hexichol is added The dichloromethane solution (1.0mL) of base -2- allyl acetic acid ester, be subsequently added into methylmalonate (0.17mL, 1.5mmol) and BSA(0.37mL,1.5mmol).After being stirred at room temperature for 24 hours, with 10mL saturated ammonium chloride solution quenching reaction, organic phase, water are separated It is mutually extracted with ethyl acetate (2 × 10mL), merges organic phase, anhydrous sodium sulfate is dry.Decompression boils off solvent, and residue is through silica gel Column chromatography for separation (petrol ether/ethyl acetate=5/1, v/v), obtains colorless oil.88% yield, 92%ee value (Daicel Chiralcel AD-H,n-hexane/i-PrOH=90:10,1.0mL/min,254nm):tR(minor)=14.43min,tR (major)=19.77min).1H NMR(300MHz,CDCl3):δ7.35-7.17(m,10H,Ar-H),6.47(d,J= 15.75Hz,1H,-CH=),6.32(dd,J=8.43Hz,15.90Hz,1H,-CH=),4.26(dd,J=8.43Hz,10.80Hz, 1H,CH),3.95(d,J=10.80Hz,1H,CH),3.71(s,3H,-OCH3),3.52(s,3H,-OCH3)。

Claims (6)

1. a kind of aminothiazole quinoline chiral ligand compound, which is characterized in that it is the hand of skeleton that the ligand compound, which has phenyl ring, Property neighbour's aminothiazole quinoline structure, general structure are as follows:
In Formulas I:
R1And R3For hydrogen;
R24 are S configuration asymmetric carbon atom on methyl, isopropyl, isobutyl group, phenyl and benzyl, thiazoline ring.
2. the preparation method of aminothiazole quinoline chiral ligand compound according to claim 1, which is characterized in that the side Method is using o-nitrobenzoic acid as raw material, successively after three acylation, amidation and cyclisation/reduction steps, " one kettle way " synthesis;
Three steps are successively acylation, amidation, cyclisation/reduction, " one kettle way " synthesis, reaction equation and steps are as follows:
(1) acylated: by o-nitrobenzoic acid and acylating reagent thionyl chloride, oxalyl chloride, phosphorus pentachloride or phosphorus oxychloride by mole Than 1:(1.2~20) 0~100 DEG C react 0.5~for 24 hours to get arrive corresponding acid chloride intermediate;
(2) step (1) amidation: is obtained into acid chloride intermediate and corresponding chiral amino alcohol 1:(1.2~5 in molar ratio) it is added Into inert organic solvents tetrahydrofuran, methylene chloride or chloroform, in excessive organic base: pyridine, triethylamine or DBU;Or nothing Machine alkali: NaOH or NaHCO3In the presence of, 0.5 is stirred to react in room temperature~-78 DEG C~for 24 hours, i.e. generation hydroxy amide II, wherein R For R2
(3) cyclisation/reduction: by 1:(2~10 in molar ratio hydroxy amide II and phosphorus pentasulfide that step (2) obtains) it is added to In atent solvent toluene or benzene, in the presence of organic base pyridine or triethylamine, 80~120 DEG C are stirred to react 2~48h, i.e., raw At corresponding amino-thiazol quinoline ligand compound;Wherein in Formulas I:
R1And R3For hydrogen;
R24 are S configuration asymmetric carbon atom on methyl, isopropyl, isobutyl group, phenyl and benzyl, thiazoline ring.
3. the preparation method of aminothiazole quinoline chiral ligand compound according to claim 2, which is characterized in that the step Suddenly o-nitrobenzoic acid is commercially available in (1).
4. the preparation method of aminothiazole quinoline chiral ligand compound according to claim 2, which is characterized in that the step Suddenly the dosage of inert organic solvents tetrahydrofuran, methylene chloride or chloroform is the 20~200 of chiral amino alcohol mole in (2) Times.
5. the preparation method of aminothiazole quinoline chiral ligand compound according to claim 2, which is characterized in that the step Suddenly in the reaction of (3), while intramolecular dehydration cyclization, nitro is reduced into amino.
6. the preparation method of aminothiazole quinoline chiral ligand compound according to claim 2, which is characterized in that the step Suddenly in the reaction of (3), the dosage of atent solvent benzene or toluene is 40~100 times of hydroxy amide II mole, organic base pyridine Or the dosage of triethylamine is 4~30 times of hydroxy amide II mole.
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